diff --git a/.github/workflows/tugboat-pr-closed.yml b/.github/workflows/tugboat-pr-closed.yml
index 31330d9af..13b5fe8fa 100644
--- a/.github/workflows/tugboat-pr-closed.yml
+++ b/.github/workflows/tugboat-pr-closed.yml
@@ -23,6 +23,6 @@ jobs:
             ref: 'main',
             inputs: {
               action: 'delete',
-              pr_number: ${{ github.event.pull_request.number }},
+              pr_number: '${{ github.event.pull_request.number }}',
             }
           });
diff --git a/.github/workflows/tugboat-pr-opened.yml b/.github/workflows/tugboat-pr-opened.yml
index 1872640e0..327287a40 100644
--- a/.github/workflows/tugboat-pr-opened.yml
+++ b/.github/workflows/tugboat-pr-opened.yml
@@ -24,7 +24,7 @@ jobs:
             ref: 'main',
             inputs: {
               action: 'create',
-              pr_number: ${{ github.event.pull_request.number }},
+              pr_number: '${{ github.event.pull_request.number }}',
               pr_title: '${{ github.event.pull_request.title }}',
             }
           });
diff --git a/.github/workflows/tugboat-pr-updated.yml b/.github/workflows/tugboat-pr-updated.yml
index eaea0e881..2c855898b 100644
--- a/.github/workflows/tugboat-pr-updated.yml
+++ b/.github/workflows/tugboat-pr-updated.yml
@@ -23,6 +23,6 @@ jobs:
             ref: 'main',
             inputs: {
               action: 'rebuild',
-              pr_number: ${{ github.event.pull_request.number }},
+              pr_number: '${{ github.event.pull_request.number }}',
             }
           });